Fluid hoisting machinery.



G. F. BLAKE 6: G. W. AVBLING.

FLUID HOISTING MAGHIHBBY.

APPLIOATIOH FILED was a, 1908.

917,992. I 9 PatentedApr.13,l909.

4 SHEETS-SHEET 1.

In Em Wi ness 5: 7/

E11inIIc|nF.ElaKE.

WWM Z NIB Pn EH 5.

G. F. BLAKE & G. W. AVBLING.

rum) aozswme mcnmnny.

APPLICATION FILED JUNE 8, 1908,

Patented Apr. 13, 1909.

4 SHEETS-SHEET 2.

. E. istiaanwhvelin UPHE S.

ITu/En ors. BHTHTIFEIEKE 0. P. BLAKE & 0. W. AVBLING. FLUID HOISTING MACHINERY. APPLIGATION FILED JUNE 8, 1908.

917,992. Patented Apr. 13, 1909. H I j 4 SHEETSSH.EET 3- 1W an we .G. F. BLAKE & W.-'AVBLING.

FLUID HOISTING MACHINERY. APPLICATION FILED JUNE 8, 1908.

I Patented Apr. 13, 1909.

4 SHEETS-SHEET 4.

m f. Blake 49 [I hPIstiaan W rivaling. Wm

both in the county of C00 U IT D STATES PATENT oFFroE CLINTON F. BLAKE, OF onlcAco, AND QHRISTIAAN w. AvELING, OF MORGAN PARK, IL I- NOIS, ASSIGNORS TO CALUMET-ENGINEERING WORKS, OF HARVEY, ILLINOIS, A CORPO- RATION OF ILLINOIS.

FLUID HOISTING MACHINERY.

Application filed. .Tune 8, 1908 Serial No. 437,212.

To all whom it may concern? Be it known that we, CLINTON F. BLAKE and CHRrsTIAAN W. AVELI G, residing, respectively, at Chicago ,Morgan Park, and State of Illinois, have invented a certain new and useful Improvement in Fluid Hoisting Machinery, of whichthe following is a full, clear, concise, and exact description, refer ence being had to the accompanying drawings, forming a part of this specification.

Our invention relates to fluid hoisting machinery, particularly to air hoists and covers the improved construction arrangement and operation of the controlling mechanism therefor, particularly the valve mechanism- Air hoists usually comprise a cylinder, in which is a piston rod which extends downwardly and terminates in a lifting hook. In

' the class to which our invention is applied,

- outside in an actuating lever.

the, controlling valve mechanism is usually mounted on the outside of the cylinder and has connection. with the cylinder so that ad justrnent thereof will connect the cylinder ends in various Ways with the source of pressure or vacuum, and with atmosphere. The valve body frame is usually mounted at the'lower end of the cylinder and is connected through piping with the cylinder ends andwith the source of compression. The valve. body frame forms a valve chamber and is finished to form a valve seat. The valve rests against this seat .with its stem extending outwardly through the valve bonnet .or cap, the stem terminating at the In some. devices, the valve stem is hollow to form a passageway or port but this construction is open to several objections.

The main object of our invention is to overcome these objections and deficiencies which exist in rior devices of this kind. To overcome the rst objection, we do not have the valve seat on the valve body part which Specification of Letters Patent.

- cylinder; Fig.

In the first place, in. order that the valve seat can be reground it is necessary to disturb and remove the piping atented April 13, 1909.

is connected with the pi ing but put the valve seat on the inside 0 the valve bonnet or cover. The cap bonnet is held in place by'bolts or cap screws and can be readily removed at any time so that its seat maybe reground, it being unnecessary to disturb in any way the valve body or the piping connecting therewith. The valve in the form of a cylindrical disk seats against the bonnet with its stern extending outwardly to be connected with the adjusting lever. To overcome the second objection noted above, we keep the valve stem free from ports or passageways, all the ports and passageways being in the valve or in the bonnet. There is,-therefore, no chance for leakage as all Wear is taken up by the valve which is held against its seat. Under working conditions, the pressure in the valve chamber will hold the valve on itsseat but we also provide a spring which will insure seating of the valve at all times.

In the accompanying drawings, which clearly illustrate our invention and its applicabilityFigure 1 is an elevation view of an air hoist cylinder showing the valve mechanism when placed thereon and in neutral position; Fi 2 is a sectional view taken on line 2, 2 of ig. 1; Fig. 3 is an enlarged fnont view of the valve mechanism showing the position thereof for causing lowering of the piston; Fig. 4 is a similar view showing the valve mechanism in hoisting position; Fig. 5 is a sectional view taken on line 5, 5 of Fig. l, showing also a section of the lower endof the 6 is a sectional view taken on plane 6, 6 of Fig. 4;; Fig. 7 is a sectional view of the upper part of Fig. 3 taken on plane 7, 7 Fig. 8 is a top view of the valve mechanism; Fig. 9 is a front view of the valve mechanism, the valve bonnet and-valve being removed. Fig. 10 is a side view of the valve mechanism, the top view being shown in sectionalong plane 10,10, Fi 9, and Fig. 11 is piston rod 7 extends h stufiEing box 8 formed in the lwei7 e1id{;3-,t e'

lower ,end of the piston rod terminatingin'a respectively. The

lifting hook 9 in suitableconstruction." 1'

The valve mechanism for controlling the operation of the piston comprises;' the valve frame 10 having flanges 11 whereb be bolted tothe seat 12 formed on t eiiange 1-3 at the lower end of the cylinder. This valve frame forms a cylindrical valve chamber 14 and at its upper end are two threaded lugs 15 and 16 for receiving pipe 17 and 18 ipe.17 extends upwardly to the top of the cylin a and where it is adapted forconnection with other piping or hose 19 and connecting with I a compressor usuall The piping -18 extends upwardly para el to the cylinder and to piping 17, its upper end threading into an opening20 in the flange 21 at the upper end of the cylinder, this opening communicating with one end of passageway 22, whose other end communicates with the top of the cylinder. A assa eway 23 through the up e'r wall of t e va ve frame connects the va veychamber with the piping 17 and the valve;

chamber is therefore always 1n connection with the coin ress'or. A passageway'l24 leads from the ower end of the va ve chamber through the valve frame wall, throughthe flange 13 and through the end 3 to communicate with the lower end of the cylinder, the lower end of the cylinder. being threforej -.connection of t e piston rod'with the piston, the lower 'face of the piston will have less always connectedwith the valve chamber and with the compressor. The valve-bonnet 25 is also'cylindrical and has bolt lugs% for registeringwith lugs 27 on the" valve frame, bolts 28 passing, through these lugs to securely hold the bonnet to the frame. The inner face 29 of the bonnet is dinished and grou d to form a seat for the' valve 30, whic is in the form. of a cylindrical disk. A guide stem 31 extends r'earwardly from the valve and is encircled in a compression spring X 32 5 whose end engages in the pocket 33 formed in the rear wall of the valve frame. When the ressure is on,

, the valve will beheld against its seat by'the pressure, and thespring32 is provided only or holding the valve against the seat when the pressure is oil. Inthe outer side of the valve is a square opening 34 for receiving the the cotter pin 41. An annular flange 42 extendsrearwardly from the hub 39 of the lever and hasbearing engagement with the lug 37 the leverbeing thus securely pivoted en-- tirely independently of the valve stem, which I is thus relieved of all strains.

Upon turning of the actuating lever, the valve will be reit "may der where it is secured tated on its seat. A. port passageway ex-' tends entirely through the'valve, while passageways 44 and 45 terminate in the valve faceand extendinto the body of the valve 2. distance and are connected by the passageway 46 Through the valve bonnet is a passageway-47 which'terminates in the" valve seat at the port opening 48 and which connectswith atmos here at the outlet 49.. Through the valve onnet, there is also a D passageway 50 which terminates in the port opening 51 in the valve seat, and which at its other end connects with the passageway 52-leadii1gto the pipe 18 which connects with the topofithe cy so mder.

, If it is desired to lower the hook so that connection may be'made with material to be lifted the controlling lever 40 is rotated in counter-clockwise direction to carry the valve to position shown in Figs. 3 and 7. In this.position, the valve assa'geway 43 be in register with the end 51 of passageway 50. This brings the pifiing lis, and con' sequently the topof the 03 'nder, into communication' with the valve chamber, which, --as before shown, is always connected with the compressor through pi ing 17. Ashas also been'show'n,the valve chamber is always c0nne cted with the lower end of thecylinder through passageway 24; Both the upperand lower ends of the cylinder are therefore now connected with the valve chamber and with the com res'sor. On account of the available area for the pressure to work}- against, and the top ofthe iston having more available area, the resu t will be that although the ressure per square [is alike at both sides of the piston the piston 'Wlll be moved downwardly. As soon ash-the hook has been lowered sufiiciently to "make connection with the work to be lifted-, -the valve is rotated in clock-wise directionto disconnect the passageway 43 from,"pas sageway 50, and the piston therefore-f'stop. After'connection is made the lever is tiiriied' in clock-wise'direction to carry the passage ways 44 'and.'45 into register withthe; passageways 4'6 and 50 respectively. The pas- 1 15 7 sagewa 50 will now heconneeted with-Th atmosp ere through passa eway' '45 connecting'pas'sa'geway 46,.pas a'geway 44 and passageway 47. The top of the cylinder is therefofe connected. with atmosphere, but the. lower end of the piston remains connected with the valve chamber and ,the comressor, the' result being that the piston will he-raised and the work lifted. When the Work has been lifted to a sufficient height, 'the valveis rotated counter-wise a sufiicient distance to disconnect the passa eway' 50 from atmosphere and the piston wi come to rest. After the hoist with the work has been transported tothe proper place and it is-de- 13' disconnected. The positions indicated in.

Figs. 3 and 4 are, of course, the maximum positions of the valve. It is clearly understood that the valve can be lapped, that is, the :passageways can be brought gradually and inore or less into engagement to start or stop slowly and with any speed. In the normal position of the valve, the lever is horizontal, as shown in Fig. 1, and the passageways 43 and 45 will be disconnected from passageway 50, the lower part of the cylinder being'in connection with the cornpressor and all openings above the piston be ing closed. The lever is usually held in its neutral position by centering mechanism which comprises the spring 53 which is socured at its upper end to the frame 54 mounted on the piping 17 and 18 and which at its lower end engages the ends of chain sections 55 and 56, whose other ends engage wit-h the controlling lever 40 at points 57 and 58 which are equidistant from the valve stem. Chains 59 and 60 also extend from the ends of the lever, by means of which the levermay be rotated. After each rotation of the lever, it will be restored to its normal position by the centering attachment and the piston will come to rest.

By our improved construction and arrangement, two 'very important features result: first, that the valve mechanism can be taken apart for repair and regrinding without in any Way disturbing the piping and other connections of the valve mechan-v ism with the cylinder; and secondly, that the connectionsv are, accomplished by the valve independently of ports or passageway through parts which are subject to wear, such as the valve stem. In our valve, no amount of wear on the stem will have any effect on the operation of the valve, which is always held against its seat either by the pressure in the. valve chamber or by the spring 32, and all wear on the valve seat or valve is thus taken up and a tight connection always maintained. No stuffing box is necessary as in other valves where there are ports or passageways through the valve stem or controlled by the valve stem. In order to disconnect the various parts of the valve mechanism, all that is necessary is the removal of the bolts 28 and the cotter pin 41, and these parts can as readily be connected together again. If the parts are Worn, they could quickly be replaced by hoisting mechanisms to which. I' have referred, the part which Wears the most, namely, the valve frame, is connected rlgidly In other with the piping and can not be removed or replaced without consuming a great deal of time.

Vc' do not wish to be limited to the precise arrangement of ports and passageways herein shown, as the broad features of our inventions are equally appli-L-nble to valve mechanisms having differently arranged ports and passageways. ()ur valve mechanism would also be equally efficient for controlling the flow of fluids other than air.

Having thus described. our invention, we desire to secure the following claims by Letters Patent:

1. In a device of the class described, the combination of fluid lifting mechanism, a valve frame forming a valve chamber and connected with a source of fluid, connections between said valve frame and fluid lifting mechanism, a valve bonnet for said valve frame, and a valve carried by and seated on said bonnet, said bonnet being independent of the connections between the valve frame and fluid lifting mechanism whereby said bonnet may be removed without disturbing such connections.

In a devicc'of the class described, the combination of fluid lifting mechanism, a valve structure comprising a stationary part and a removable p'art, said stationary part sup- , posed Within the valve chamber upon application of the bonnet to said stationary part. said bonnet being entirely independent of said connections between the valve. chamber and fluid lifting mechanism.

3. In a device of the class described, the combination of a cylinder, a lifting piston within the cylinder, a frame secured to the cylinder and forming a valve chamber,

\ piping secured to said frame and cylinder and communicating with the upper end of the cylinder, a connection between said valve chamber and the lower end of the cylinder, a detachable valve bonnet carried by the frame, a valve within the valve chamber, passageways in said bonnet, passageways in said frame connected withsaid piping and passageways in said valve, and means for moving said valve, said passageways-cooperating upon movement of said valve to control the connection of said valve chamber with the cylinder, said bonnet. being entirely independent of said piping whereby said bonnet maybe removed without disturbing said piping.

4. In a device of the class described, the combination of a cylinder, a lifting piston Within the cylinder, a frame carried on said cylinder and forming a valve chamber, a con- Ill] nection between said valve chamber and one end of the cylinder, a passageway in said frame, pping secured to the frame and cyl inder an connecting said passagewa to the other end'of the cylinder, a detachab e valve bonnet carried by the frame, a valve within the valve frame carried by and seated on said bonnet, a passageway through said bonnet connected with the passageway in said frame, piping secured to the frame and cyl' inder and connecting said passagewa to the other end of the cylinder,- a 'detachab e valve bonnet carried by the frame, a valve withinthe valve frame carried b and seated on said bonnet, a passageway t rough said bonnet connected withthe passagewa in said frame, passageways throu h said va ve, and means for moving said 'va ve on its seat to control the cooperation of said thereby the connection of t e va ,ve chamber withthe cylinder, said valve bonnet 'bein entirely independent of said piping an thereby removable from the frame without disturbing saidpipin 6'. In a device of t c class described, the combination of a cylinder, a piston within the cylinder, .9. frame carried on said cylinder and forming a valve chamber, a passageway in said frame, piping secured to the cylinder and to the frame for connecting said assage- 'wayat one end of the cylinder, an a ditional pipe secured to'said frame and cylinder for connecting said valve chamber with a source of fluid, a passageway connecting said valve assa eways and 7 chamber with the other end of said cylinder,

,a valvewithin the valve chamber, a detachable bonnet carried by said frame, a passageway through said bonnet connected with the passageway through said frame, a passage-- rough said valve, and means for mov -7.- In a device of the class described, the

combination of a cylinder, a piston within the cylinder, a valve frame secured to the cylinder and forming a valve chamber, a bonnet for said valve frame havin a lug extendin outwardly therefrom, ava ve within the va ve chamber, a stem extending from said valve through the bonnet and lug thereon, andan actuating lever pivoted on and supported by said lug and having'connection with said valve stem.

8. .In a device of theclass described, the

combination of a cylinder, a lifting piston within the cylinder, a valve frame secured to the cylinder and forming a valve chamber, a

bonnet for the frame, a lug extending out wardly from said bonnet, a valve witlnn the valve chamber, a stem extending from said valve through the bonnet and lug, an actuating lever, a flange extendin from said actuatm lever and receiving t e lug, whereby saiddeveris entirely pivoted on said In and means connecting said lever with sai valve stem whereby actuation of said lever will cause actuation of the valve. 1

- In witness whereof, we have hereunto subscribed our names this 29thday' of May A. D.' 1908.

CLINTON F. BLAKE. CHRISTIAAN W. AVELING.

Witnesses:

"s J. SCHMIDT, GEORGE E; HIGHAM. 

